| Standard label: | Preferred Stock, Value, Issued |
| Name: | us-gaap:PreferredStockValue |
| Documentation: | Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:PreferredStockValue |
| Label | Role | Language |
| Preferred Stock, Value, Issued | http://www.xbrl.org/2003/role/label | en-US |
| Preferred Stock, Value, Issued, Ending Balance | http://www.xbrl.org/2003/role/periodEndLabel | en-US |
| Preferred Stock, Value, Issued, Beginning Balance | http://www.xbrl.org/2003/role/periodStartLabel | en-US |
| Preferred Stock, Value, Issued, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 210 10 S99 1 (SX 210.5-02(28)) | http://fasb.org/us-gaap/role/ref/legacyRef | 210 |
| Part Of Roll Up: |
| us-gaap:StockholdersEquity |
| us-gaap:PreferredStockIncludingAdditionalPaidInCapital |